Dasuki Dema, Aridi Amani, Elkady Marwa, Habanjar Khulud, El-Subruiti Gehan M, Awad Ramadan
Physics Department, Faculty of Science, Beirut Arab University, Beirut, Lebanon.
Public Health Department, Faculty of Health Sciences, Modern University of Business and Science, Beirut, Lebanon.
Environ Sci Pollut Res Int. 2025 Jan;32(1):23-42. doi: 10.1007/s11356-024-35734-0. Epub 2024 Dec 12.
Cancer, kidney and liver damage, and even death result from water contaminated with textile dyes. This study highlighted a key approach for treating water contaminated with methylene blue (MB) dye. Bismuth-doped ferrite nanoparticles (NiZnCoBiFeO) with 0 ≤ × ≤ 0.2 were synthesized using a chemical co-precipitation technique. For the structural analysis, X-ray diffraction (XRD) confirmed the successful formation of ferrite nanoparticles with a hematite phase of 21.02% for x = 0.2. The crystallite size decreased from 30.12 to 13.65 nm, as x increased from 0 to 0.2. Also, a decrease in the grain size from 24.57 to 12.37 nm was verified via transmission electron microscope (TEM) analysis. Furthermore, the X-ray photoelectron spectroscopy (XPS) confirmed the optimal stoichiometric proportions of the synthesized nanoparticles through the elemental composition analyzed. Additionally, XPS analysis revealed that the un-doped sample has gained the highest number of defects along with the photoluminescence spectra (PL) discussion. The optical analysis was investigated by photoluminescence spectra (PL) through several excitation wavelengths. The detected PL peaks in the near-band energy and the defect-level emission region confirmed the recombination rate and the presence of defects, respectively. Doping ferrite nanoparticles with bismuth increased the specific surface area from 43.82 to 71.83 m·g and altered pore volume and diameter. For further investigation, the adsorption performance of ferrite nanoparticles was tested using MB as a pollutant. Un-doped nanoparticles demonstrated significant adsorption activity, removing 97.1% of MB after a contact time of 120 min. Furthermore, un-doped nanoparticles exhibited improved adsorption activity in a basic medium, while Bi-doped nanoparticles showed enhanced performance in an acidic medium. This result was due to Bi-doping altering the surface charge, as confirmed by zeta potential analysis. Among the applied non-linear isotherms, the Freundlich model best described the adsorption of MB onto the NiZnCoBiFeO nanoparticles. Increasing the temperature boosted the adsorption of MB onto the prepared nanoparticles.
受纺织染料污染的水会导致癌症、肾脏和肝脏损伤，甚至死亡。本研究突出了一种处理受亚甲基蓝（MB）染料污染的水的关键方法。采用化学共沉淀技术合成了0≤×≤0.2的铋掺杂铁氧体纳米颗粒（NiZnCoBiFeO）。对于结构分析，X射线衍射（XRD）证实成功形成了铁氧体纳米颗粒，当x = 0.2时赤铁矿相含量为21.02%。随着x从0增加到0.2，微晶尺寸从30.12减小到13.65纳米。此外，通过透射电子显微镜（TEM）分析证实晶粒尺寸从24.57减小到12.37纳米。此外，X射线光电子能谱（XPS）通过分析元素组成证实了合成纳米颗粒的最佳化学计量比。此外，XPS分析表明，未掺杂样品的缺陷数量最多，同时还进行了光致发光光谱（PL）讨论。通过光致发光光谱（PL）在几个激发波长下对光学性质进行了研究。在近带能量处检测到的PL峰和缺陷能级发射区域分别证实了复合率和缺陷的存在。用铋掺杂铁氧体纳米颗粒使比表面积从43.82增加到71.83 m·g，并改变了孔体积和直径。为了进一步研究，以MB作为污染物测试了铁氧体纳米颗粒的吸附性能。未掺杂的纳米颗粒表现出显著的吸附活性，在接触120分钟后去除了97.1%的MB。此外，未掺杂的纳米颗粒在碱性介质中表现出更好的吸附活性，而铋掺杂的纳米颗粒在酸性介质中表现出更高的性能。zeta电位分析证实，这一结果是由于铋掺杂改变了表面电荷。在所应用的非线性等温线中，Freundlich模型最能描述MB在NiZnCoBiFeO纳米颗粒上的吸附。升高温度促进了MB在制备的纳米颗粒上的吸附。
